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Railway vehicle fault vehicle-mounted acoustic detection system and method

A technology of transportation and detection system, applied in railway vehicle testing and other directions, can solve the problems of difficulty in manual detection, poor real-time performance, and low accuracy, and achieve the effect of improving accuracy and reliability, reducing operation difficulty, and realizing real-time monitoring.

Inactive Publication Date: 2016-12-07
HARBIN KEJIA GENERAL MECHANICAL & ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems of difficulty in manual detection, low accuracy and poor real-time detection of vehicles by the dynamic detection system installed on the ground
Now provide rail vehicle failure on-board acoustic detection system and detection method

Method used

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  • Railway vehicle fault vehicle-mounted acoustic detection system and method

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specific Embodiment approach 1

[0022] Specific implementation mode one: refer to figure 1 Specifically illustrate the present embodiment, the rail vehicle failure vehicle-mounted acoustic detection system described in the present embodiment, it comprises sound acquisition unit 1, signal processing unit 2, feature extraction unit 3 and comparison unit 4,

[0023] The sound acquisition unit 1 is composed of one or more acoustic sensors to form a sensing network, and the acoustic sensors are installed near the parts to be measured of the rail vehicle, and are used to collect the sound generated by the rail vehicle during driving, and the sound is converted and After encoding, save it as a sound file;

[0024] The signal processing unit 2 is used to filter the saved sound file, filter out the noise signal, and then separate the filtered sound to obtain the sound data of the component to be tested;

[0025] Feature extraction unit 3, which extracts features from the sound data on the component to be tested, to ...

Embodiment

[0028] Rail vehicle failure on-board acoustic detection system, which includes a sound acquisition unit 1, a signal processing unit 2, a feature extraction unit 3 and a comparison unit 4,

[0029] The sound acquisition unit 1 is composed of one or more acoustic sensors to form a sensing network, and the acoustic sensors are respectively installed near the parts to be measured of the rail vehicle, and are used to detect the sound generated by the rail vehicle during driving. The digital converter converts the sound analog signal into a binary code that can be recognized by the computer, encodes the data according to the PCM format, and saves it as a sound file in the WAV format;

[0030] The signal processing unit 2 is used to receive the saved sound file, use a ripple high-pass filter to filter out the noise signal in the low frequency band of the sound signal, and then separate the filtered sound to obtain the high frequency on the parts detected by each acoustic sensor sound...

specific Embodiment approach 2

[0045] Specific embodiment two: this embodiment is to further illustrate the rail vehicle failure vehicle-mounted acoustic detection system described in specific embodiment one. In this embodiment, the conversion of sound is realized by a digital-to-analog converter, and the analog-to-digital converter converts the sound Analog signals are converted into digital signals that can be recognized by computers.

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Abstract

The invention belongs to the field of rail transit tool safety detection, and provides a railway vehicle fault vehicle-mounted acoustic detection system and a detection method. According to the technical scheme of the invention, the system and the method solve the problems in the prior art that the existing manual detection is difficult in operation and low in accuracy and a dynamic detection system installed on the ground is poor in detection real-time performance. A sound obtaining unit is used for obtaining an original sound signal. A signal processing unit is used for carrying out the filtering treatment and the data separation treatment on the original sound signal. A feature extraction unit is used for carrying out the feature extraction on the processed sound signal. A comparison unit is used for performing the time-domain and frequency-domain analysis on the extracted feature to obtain a characteristic value matrix of the sound signal. The characteristic value matrix is compared with a sound characteristic database without a fault standard. During the comparison process, based on the domain and frequency domain combination method, whether a fault exists or not, and the existence degree of the fault are judged in the time domain firstly. Secondly, the comparison is further performed in the frequency domain to obtain a corresponding fault diagnosis result. Therefore, the system and the method are used for the fault detection of various rail vehicles.

Description

technical field [0001] The invention relates to a vehicle-mounted acoustic detection system and a detection method for rail vehicle faults. The invention belongs to the field of rail vehicle fault detection. Background technique [0002] As the core part of railway transportation, rail vehicles may have abnormalities in car body parts during operation. The occurrence of abnormal parts will endanger driving safety. Therefore, the comprehensive, accurate and fast fault detection of rail vehicles is very important to the safe operation of the railway. [0003] At present, there are usually two methods of manual detection and ground-to-vehicle dynamic detection for rail vehicle failures. The following two methods have the following defects: [0004] 1. Rail transportation vehicles, including freight cars, passenger cars, EMUs, locomotives and other types of trains, are in motion most of the time, and are only inspected after entering the station or after completing the operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/08
CPCG01M17/08
Inventor 秦昌周立君付志豪郑伟
Owner HARBIN KEJIA GENERAL MECHANICAL & ELECTRICAL CO LTD
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